This was really easy to build and my cat loves it! He loves the mouse, chewing on the rope and sleeping in the little hole. The only thing is that I think it was made for kittens. My cat weighs about 12 lbs (he's an adult) and when he climbs on it quickly, the tree wobbles. Also, he's a little too big to fit in the top part, he spills out a little, but obviously he's a cat and doesn't care and still sleeps up there! But just keep in mind that this cat tree would be better for kittens!